2109455 has 4 divisors (see below), whose sum is σ = 2531352. Its totient is φ = 1687560.

The previous prime is 2109449. The next prime is 2109461. The reversal of 2109455 is 5549012.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2109449) and next prime (2109461).

It is not a de Polignac number, because 2109455 - 2⁶ = 2109391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210941 + ... + 210950.

It is an arithmetic number, because the mean of its divisors is an integer number (632838).

2^2109455 is an apocalyptic number.

2109455 is a deficient number, since it is larger than the sum of its proper divisors (421897).

2109455 is an equidigital number, since it uses as much as digits as its factorization.

2109455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421896.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2109455 is about 1452.3962957816. The cubic root of 2109455 is about 128.2498172908.

The spelling of 2109455 in words is "two million, one hundred nine thousand, four hundred fifty-five".